must vulcanise
Verbo regular: vulcanise - vulcanised- vulcanised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must vulcanise
you must vulcanise
he must vulcanise
we must vulcanise
you must vulcanise
they must vulcanise 	I must be vulcanising
you must be vulcanising
he must be vulcanising
we must be vulcanising
you must be vulcanising
they must be vulcanising	I must have vulcanised
you must have vulcanised
he must have vulcanised
we must have vulcanised
you must have vulcanised
they must have vulcanised	I must have been vulcanising
you must have been vulcanising
he must have been vulcanising
we must have been vulcanising
you must have been vulcanising
they must have been vulcanising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not vulcanise
you must not vulcanise
he must not vulcanise
we must not vulcanise
you must not vulcanise
they must not vulcanise 	I must not be vulcanising
you must not be vulcanising
he must not be vulcanising
we must not be vulcanising
you must not be vulcanising
they must not be vulcanising	I must not have vulcanised
you must not have vulcanised
he must not have vulcanised
we must not have vulcanised
you must not have vulcanised
they must not have vulcanised	I must not have been vulcanising
you must not have been vulcanising
he must not have been vulcanising
we must not have been vulcanising
you must not have been vulcanising
they must not have been vulcanising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I vulcanise?
must you vulcanise?
must he vulcanise?
must we vulcanise?
must you vulcanise?
must they vulcanise? 	must I be vulcanising?
must you be vulcanising?
must he be vulcanising?
must we be vulcanising?
must you be vulcanising?
must they be vulcanising? 	must I have vulcanised?
must you have vulcanised?
must he have vulcanised?
must we have vulcanised?
must you have vulcanised?
must they have vulcanised? 	must I have been vulcanising?
must you have been vulcanising?
must he have been vulcanising?
must we have been vulcanising?
must you have been vulcanising?
must they have been vulcanising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not vulcanise?
must you not vulcanise?
must he not vulcanise?
must we not vulcanise?
must you not vulcanise?
must they not vulcanise? 	must I not be vulcanising?
must you not be vulcanising?
must he not be vulcanising?
must we not be vulcanising?
must you not be vulcanising?
must they not be vulcanising? 	must I not have vulcanised?
must you not have vulcanised?
must he not have vulcanised?
must we not have vulcanised?
must you not have vulcanised?
must they not have vulcanised? 	must I not have been vulcanising?
must you not have been vulcanising?
must he not have been vulcanising?
must we not have been vulcanising?
must you not have been vulcanising?
must they not have been vulcanising?